21 research outputs found
Theorem of Corresponding Hydrodynamic States for Estimation of Transport Properties:Â Case Study of Mass Transfer Coefficient in Stirred Tank Fitted with Helical Coil
Batch and Continuous Photocatalytic Degradation of Benzenesulfonic Acid Using Concentrated Solar Radiation
Gas-liquid mass transfer coefficient in stirred tank reactors
Volumetric gas—liquid mass transfer coefficient (kLa) data available in the literature for larger tanks (T = 0.39 m to 2.7 m) have been analyzed on the basis of relative dispersion parameter, N/Ncd. It was observed that at a given superficial gas velocity (VG), kLa values were approximately the same irrespective of geometric configuration (size of the tank, type and size of the impellers, type of the sparger, etc.) at a particular N/Ncd. A single correlation based on N/Ncd is presented which shows satisfactory agreement with the kLa data of different workers
Gas Hold-Up in Stirred Tank Reactors in the Presence of Inorganic Electrolytes
Gas hold-up (εG) in air-aqueous electrolyte solutions in stirred tank reactors (STR) is correlated using a relative gas dispersion parameter, N/Ncd and a surface tension factor (STF), (c/z)(dδ/dc)2. For electrolyte concentration below transition concentration (ct) a single correlation in the form of εG = f(N/Ncd, vvm, STF) shows good agreement with gas hold-up data over a wide range of system and operating conditions. Above ct no effect of STF on gas hold-up is observed and the correlation obtained is of the form εG = f(N/Ncd, vvm). Data available in the literature on large STR show good fit with the proposed correlation